Evaporating apparatus



(No Modl.) Q 2 Shets-Sheet 1.

W. H; UNDERWOOD.

4 .EVA-PO-RATING APPARATUS. I No. 603,543. Patented May 3,1898;

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(No Model.) Sheets-Sheet 2.

W. H. UNDERWOOD. EVAPORAIING APPARATUS.

No.60 3 ,543. A f .Pate nte'd May3,1 898.

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' UNITED STATES WVALTER H. UNDERWOOD,

PATENT OFFICE.

OF HUTCI-IINSON, KANSAS.

EVAPORATING APPARATUS.

SPECIFICATION forming part of Letters Patent N 0. 603,543, dated May 3,1898.

Application filed July 9, 1897. Serial No. 644,006. (No model.)

To all whom it may concern:

Be it known that I, WALTER H. UNDER- WOOD, of Hutchinson, in the countyof Reno and State of Kansas, have invented a new and ImprovedEvaporating Apparatus, of which the following is a .full, clear, andexact description.

The invention relates to evaporating apparatus used in the manufactureof salt and the like; and the object of the invention is to provide anewand improved evaporating apparatus in which the salt is prevented fromaccumulating on the dome of the fire-box and becoming inorusted andburned thereon, with a consequent burning out of the sheets, as is sofrequently the case in evaporating apparatus as heretofore constructed.

A further object of the invention is to i11- creasethe heating-surfaceof the fines in the pan and to prevent the said fiues from pulling outof the sheets.

The invention consists principally of a feedpipe provided with adistributer extending over the dome of the fire-box, so that thedischarged brine washes the salt off as it falls on the dome and beforeit has a chance to 'burn thereon.

The invention further consists of a fire-box, an evaporating-chamberaround the fire-box, a heating-chamber around the evaporatingchamber,and curved fiues in the said evaporating-chamber and connecting thefire-box with the heating chamber to increase the heating-surface of thefiues, and thus permit expansion and contraction of the same withoutdanger of pulling out the fines from the sheets, and also to crack thesalt accumulating on the exterior surface of the fines.

The invention also consists of certain parts and details andcombinations of the same, as will be fully described hereinafter andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures.

Figure 1 is a sectional side elevation of the apparatus, and Fig. 2 isan enlarged sectional plan view. of the same.

The improved evaporating apparatus is provided with an evaporating-panA, from the and through the brine contained therein.

with settling-legs E, opening into an elevator F, for carrying thecrystals as they form to any desired point above the level of the brinecontained in the evaporating-pan'A.

Within the evaporating-pan A is arranged I a fire-box G, and around thesaid pan is a heating-chamber H, connected by flues I with the saidfire-box, so that the flues extend horizontally through theevaporating-pan A A suitable distance above the grate of the firebox isarranged an arched partition G for causing the heat and gases from theburning fuel in the fire-box to pass through the lowermost fines I intothe chamber H, and to then pass from the latter below a partition Hthrough another set of fiues I back into the firebox above the partitionG, and to finally pass from the upper end of the fire-box through theuppermost fines I back into the chamber H above the partition H tofinally pass up the smoke-stacks 1-1 to the outside. The fiues I arecurved or S shape in form, as is plainly indicated in Fig. 2, so as toproduce a large heating-surface in the evaporating-pan A and at the sametime allow proper expansion and contraction of the lines and sheetswithout danger of the fines pulling out of their fastenings in thesheets forming the fire-box and chambers.

Now it will be seen that when the fiues expand and contract the Walls ofthe fiues cause a cracking of the salt and scale that has accumulated'onthe lines, and consequently the said fines are kept comparatively freefrom salt, and in cleaning up any particles of salt adhering to thefines may be readily knocked olf.

By having the partitions G and H in. the fire-box G and heating-chamberII, respec tively, the heat and gases arising from the burning fuel inthe fire-box are caused to travel a long distance to give 01f their heatbefore finally passing into the chimneys H and escaping to the outside.Thus a great saving of fuel is obtained in running the apparatus.

By the arrangement described the heat passes through three sets ofcomparatively long flues before passing to the chimney to obtain thefull benefit of the fuel.

The feed-pipe J for carrying the brine to the evaporating-pan Aterminates over the apex of the dome G of the fire-box, and on the innerend of this feed-pipe is arranged a distributer J, formed by tappingaseries of short pipes into the feed-pipe J, to cause the brine to passover the dome G so as to Wash off any salt that falls on the dome andbefore the salt has a chance to burn on the metal forming the dome.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. An evaporator for brine and the like,comprising three concentric chambers, the inner chamber constituting afire-box and being closed at the top by a conical dome and having apartition across the same central its ends, the intermediate chamberconstitutingthe evaporating or brine-containing chamber and extendingabove the fire-box, and the outer chamber constituting a smoke-flue orbreeching and having a partition located above the partition in thefire-box and dividing the same into two parts, the fire-box andsmoke-flue being' connected above and below both partitions byhorizontal flues curved in an S shape and extending through theevaporating-chamber, and a brine-supply pipe discharging upon the apexof the fire-box dome whereby the same is kept free of salt deposits,substantially as described.

2. An evaporator for brine and the like, comprising three concentricchambers, the inner chamber constituting a fire-box and being closed atthe top, the central chamber constituting an evaporating orbrine-containing chamber and extending above the firebox, and the outerchamber constituting a smoke-flue or breeching, the fire-box andsmoke-flue being connected by horizontal flues curved in an S shape andextending through the evaporating-chamber, substantially as described.

3. An evaporator for liquids containing salts in solution, comprising anevaporating or liquid-containing chamber having a firebox within thesame, the upper end of the fire-box being sloping, and a liquid-supplypipe having nozzles discharging the fresh brine upon and arranged toentirely cover the upper surface of the fire-box whereby the fire-boxtop is covered with fresh brine under circulation and the formation ofsalt deposits thereon is prevented.

WALTER H. UNDERWOOD.

Witnesses:

EDWIN S. MOORE, W. H. SMITH.

